With chopped strand fiberglass mats random fiber orientation, it is easy to process this reinforcing material using a hand lay-up method. First, place sheets of material on a mold. Next, thoroughly brush the sheets with resin.
Note that polyester and vinyl resin effectively dissolves the binder that holds the sheets together. When the binder is gone. the chopped strand mat will easily conform to most desired configurations when saturated with the resin.
After the resin finishes curing, remove the resin-hardened product from the mold.